Question about Lexus RX 300

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Engine knock & loss of power/acceleration

Was driving on highway when suddenly engine started losing power and stalled. After letting it sit for a little while it restarted but the check engine light was on and there's a knocking noise coming from the engine. The more I accelerate the faster the noise but the car doesn't go faster than about 30mph

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It appears that you have lost water and over heated the motor. The systoms you describe are what happens when an extra hot engine starts to seize the pistons in the bore. Cooling down allows the engine to restart but the noise comes from broken rings and aluminium being removed from the sides of the pistons. If you have an EFI car the cpu unit is probably limiting the engine revs just to get you to athe nearest service place.I suspect you will need a replacement engine

Posted on Jan 14, 2013

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Posted on Jan 02, 2017

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SOURCE: Why after driving car stopping & starting car radomly loose power

the first step is to find out why the check engine is on . you can take it to autozone they will check it free and tell you the promblem is.

Posted on Dec 07, 2008

suterman
  • 158 Answers

SOURCE: I HAVE 02 TRAILBLAZER LTZ, AND IT JUST STARTED

Hello, I see you have a trailblaber with a knocking noise. It sounds like you have an electric fan clutch issue. Believe it or not your vehicle has an electric fan clutch. It looks just like the older non-electric but if you look on the driver side of the fan shroud that is the wire connector you see. It is an exspensive part just for the clutch but thats exactly what you are describing. It doesn't get louder just fast with rpms. Please rate my answer, Thank you

Posted on Mar 06, 2009

  • 13 Answers

SOURCE: Camry engine knock and loss of power

Sounds like you've blown her up. An engine starts knocking when the bearings are worn to the point of being loose. I wouldn't keep starting her up. If I'm right(and the odds are on me) you'll sling a rod through the block or the oil pan.
If you can get the oil pan off do so(after uyou drain it of course) and grab the rods one at a time and find out which one(or more) that's giving you the problem.It(or they) will be loose around the crank shaft.
Good luck,but for Heavens sake DON'T start it again until you check those rods.

Posted on Apr 03, 2009

  • 254 Answers

SOURCE: knocking engine

This is a tell-tale sign of internal engine problems. You may have a failed piston, broken piston rings. A blown head gasket between the cylinders can also cause this problem.

I hope this helps! I wish I had better news for you. :(

Posted on Jan 17, 2010

ftw1952
  • 10319 Answers

SOURCE: Hard Acceleration causes power loss. Vehicle

Download this link and find your Service manual for your vehicle. It will serve you well and to keep for future reference

http://ezinearticles.com/?Find-the-Free-Auto-Repair-Manual-You-Need-Online&id=92717

Posted on May 02, 2010

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Car has lose of power. slow to 60 then wont go any faster.


Sudden Loss of Power while driving 65+ on the freeway ' Forums ...

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My car is back at the factory getting "worked on"...sudden loss of Power and control while driving on the freeway...has anyone else experienced this? ... My son was driving his '04 Volvo on the highway, when all of the sudden the car started slowing down, despite how much he ... Last I heard they were 60.

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The car will run fine for about 10 minutes then it will stop accelerating???


ENGINE HESITATES WHILE ACCELERATION

LOSS OF ACCELERATION


It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?

http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

-----------

Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

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Headlights flickering and car hesitates to start?

http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

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How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

-------------

How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

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2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End?

http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html

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Wheel hop under hard acceleration?

http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

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2009 Chevy impala accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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Nissan Pathfinder stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

--------

Acceleration lag problem?

http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

-------------

These details will help.

Thanks.

Nov 28, 2012 | 1999 Mercury Cougar

1 Answer

2002 BLAZER WHEN STARTING VEHICLE OIL PRESSURE GAUGE READS HIGH, KNOCKING COMING FROM ENGINE, WHEN ACCELERATING IT GETS FASTER & FEELS LIKE LOOSING POWER WHEN DECELERATING


Bang on the catalytic converter being careful not to get burnt and see if it's loose causing a rattle. Until you determind what the problem is don't drive the vehicle. The other possibility is that you may need an engine. If what you're hearing us a connecting rid knock.

Jun 06, 2012 | 2002 Chevrolet Blazer

1 Answer

Loss of brake during sudden acceleration.


Click the link below to troubleshoot this problem: ---
Car loses power while acceleration? http://schematicsdiagram.blogspot.com/2011/12/car-loses-power-while-acceleration.html

----------
Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

-----------
Acceleration lag problem?

http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

--------------
How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

-----------


How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

----------
accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

----------
stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

---------
Engine accelerates when brake is applied?

http://technoanswers.blogspot.in/2012/02/engine-accelerates-when-brake-is.html

-----------

This will help.

Thanks.

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2 Answers

Camry engine knock and loss of power


If it is a true engine knock then it is likely oil starvation or piston slap. Some folks hear "pinging" as engine knock but this is actually mistimed detonation in the cylinder caused by low octane or bad timing or other related tune factors.

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make sure your using the high grade gas, thie lower ones will cause damage to the engine, it's a small engine but a good one, so it is desingned for the higher grade to make the most of the fuel efficentcy.....shia....hope this helps

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Next time this happens, pull over and unscrew the gas cap. The vent may be clogged.

Otherwise, your catalytic converter may be failing. It can also clog and hinder engine exhaust.

Good luck !

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Your timing belt could be broken. You want to have this checked as soon as possible to prevent any further engine problems.

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